Formation of a thin-layer electrolyte for SOFC by magnetic pulse compaction of tapes cast of nanopowders

Иванов, В. В.; Липилин, А. С.; Kotov, Yu. A.; Хрустов, В. Р.; Шкерин, С. Н.; Paranin, S. N.; Spirin, A. V.; Kaygorodov, A. S.

doi:10.1016/j.jpowsour.2005.11.039

Cited by 31 publications

(14 citation statements)

References 3 publications

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“…Details of the tape-casting procedure appeared in the Ref. 7). Hereafter, the tapes prepared using P1 and P2 powders will be designated as T1 and T2 tapes, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…A low threshold temperature (800 C) for densification indicated a presence of a considerable amount of fine powders less than 1 mm, as it is generally known that adding fine powders promotes the densification and provides denser materials. 7,11) It can be also noted that the total shrinkage of the polymer-containing P2 powder was much higher than that of the polymer-free P1, suggesting that the granulated P2 powder had a higher sinterability than the P1 raw powder. In the granulated P2 powder, the primary Y 2 O 3 particles could be distributed more homogeneously than in the P1 powder, so the Y 2 O 3 particles in the P2 powder might be densified more efficiently.…”

Section: Methodsmentioning

confidence: 99%

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Fabrication of an Yttria Thin-Wall Tube by Radial Magnetic Pulsed Compaction of Powder-Based Tapes

et al. 2010

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Highly dense and homogeneous yttria (Y 2 O 3 ) thin-wall tubes have been successfully fabricated by applying tape-casting and radial magnetic pulsed compaction (RMPC) followed by thermal sintering. Since a homogeneous density distribution was obtained in the RMPCed compact, by using the Y 2 O 3 -based tape instead of a stuck of raw powder, cracking and bending were inhibited throughout the process up to the final sintered body. The relative density of the resultant tube reached 99.9%, and the structure was very fine with grain sizes of 2$5 mm. Moreover, when the granulated powder was used as the precursor of the tape, the thermal densification was promoted due to its enhanced sinterability as compared to the raw powder.

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“…Details of the tape-casting procedure appeared in the Ref. 7). Hereafter, the tapes prepared using P1 and P2 powders will be designated as T1 and T2 tapes, respectively.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Fabrication of an Yttria Thin-Wall Tube by Radial Magnetic Pulsed Compaction of Powder-Based Tapes

et al. 2010

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“…Comparada com outros métodos de fabricação, a prensagem a seco é simples, reprodutível e eficiente em termos de custo. Entre os métodos de fabricação mais empregados, cita-se spray pirólise [35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52], screen printing [53,54] e a deposição a vapor, física (PVD) ou química (CVD) [55], ou ainda uma combinação desses métodos [56]. Muitos trabalhos preparam uma camada por prensagem e a segunda camada por screen printing; por exemplo, eletrólito [27,31,35], eletrólito e catodo [32], ou eletrodos [33] por prensagem e as demais camadas por outras técnicas.…”

Section: Preparação Da Célula Unitáriaunclassified

Preparação e avaliação de célula a combustível do tipo PaCOS unitária com ânodo a base de níquel e cobalto

Silva¹,

Alencar²,

Fiúza³

et al. 2007

Matéria (Rio J.)

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RESUMOUma célula a combustível do tipo PACOS unitária foi preparada e avaliada na geração de energia elétrica, utilizando metano ou hidrogênio como combustível. O ânodo da célula foi sintetizado a partir do eletro-catalisador desenvolvido e testado nesse trabalho (CATAC). O CATAC foi preparado pela mistura mecânica da zircônia estabilizada com ítria (YSZ) com os precursores metálicos (nitrato de níquel e cobalto, em sua forma hexahidratado), adicionando-se 25% de ácido cítrico à massa total da mistura e por fim calcinado a 800°C por quatro horas em ar. O catalisador foi caracterizado por fluorescência de raios X (XRF) e espectroscopia foto-eletrônica de raios X (XPS), a qual não indicou interação eletrônica entre o cobalto e níquel; o teor metálico do CATAC foi de aproximadamente 35% em massa. O CATAC foi testado para a geração de hidrogênio a partir da reforma a vapor do metano, mostrando boa produtividade de hidrogênio a partir de 600ºC. A estrutura do ânodo/eletrólito/cátodo foi preparada por prensagem de uma camada de CATAC misturado com grafite, uma camada de YSZ puro, e uma camada de óxido misto de lantânio, estrôncio e manganês (LSM) e grafite. O conjunto foi então prensado e sinterizado a 1380°C por quatro horas. Nas superfícies do ânodo e cátodo foram fixadas telas de platina, com o auxílio de tinta de platina, sendo o conjunto aquecido a 1100°C. Todo o sistema foi colado a um reator de alumina utilizando cola cerâmica. Microscopias por MEV da estrutura mostraram eletrólito denso e eletrodos porosos, com um conjunto adequadamente sinterizado. A célula unitária foi testada utilizando metano ou hidrogênio como combustível, a três temperaturas de operação. A tensão variou inversamente proporcional com a corrente, quando o desempenho foi medido a 850 ou 950ºC e hidrogênio, mas manteve-se constante acima de cinco mV a 800ºC com metano. A célula unitária mostrou um desempenho satisfatório na geração de eletricidade tanto com metano quanto com hidrogênio como combustíveis. Palavras chaves:Rede Cooperativa, pilha a combustível, óxido sólido, catalisador, níquel, cobalto, YSZ. Synthesis and Evaluation of Solid Oxide Fuel Cell (SOFC) with Anode based on Nickel and Cobalt ABSTRACTA unitary solid oxide fuel cell (SOFC) was prepared and evaluated for the electric energy generation, using methane and hydrogen as fuel. The cell anode was made with the electro-catalyst developed and characterized in this work (CATAC). CATAC was prepared by the mechanical mixture of zirconia stabilized with ytria (YSZ) and the metallic precursors (nickel and cobalt nitrate, hexahydrated), adding 25% of citric acid to the total mass, and finally calcined at 800°C for four hours in air. The catalyst was characterized by X-ray fluorescence (XRF) and X-ray photo-electronic spectroscopy (XPS), which did not indicate any electronic interaction between nickel and cobalt; CATAC metal content was approximately 35% in mass. CATAC was tested for the hydrogen generation from methane vapor reforming, showing good productivity starting at 600ºC. The ...

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“…The YSZ nanopowder containing 9.5 mol. % Y 2 O 3 was produced by laser sputtering of a ceramic target (Ivanov et al, 2006). It was subjected to sedimentation in isopropyl alcohol to remove particles with diameter of 200 nm or larger from the powder.…”

mentioning

confidence: 99%

“…8 was plotted with expression (11). In the calculations we used powder particle size distribution established by transmission electron microscopy (Ivanov et al, 2006); it was narrow with the width of about 13 nm and had a maximum at the particle diameter of 11 nm. It was also assumed that the isotope exchange frequencies Г are not different for nano-and micropowders.…”

mentioning

confidence: 99%

Oxygen Isotope Exchange in Nanocrystal Oxides

Fishman¹,

Куренных²,

Выходец³

et al. 2011

Advances in Ceramics - Characterization, Raw Materials, Processing, Properties, Degradation and Healing

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Formation of a thin-layer electrolyte for SOFC by magnetic pulse compaction of tapes cast of nanopowders

Cited by 31 publications

References 3 publications

Fabrication of an Yttria Thin-Wall Tube by Radial Magnetic Pulsed Compaction of Powder-Based Tapes

Fabrication of an Yttria Thin-Wall Tube by Radial Magnetic Pulsed Compaction of Powder-Based Tapes

Preparação e avaliação de célula a combustível do tipo PaCOS unitária com ânodo a base de níquel e cobalto

Oxygen Isotope Exchange in Nanocrystal Oxides

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